Welcome back, Deanna,
Walt Disney World, a cruise and meeting up with family? Sounds like you have an absolutely awesome trip planned!
When I've stayed at Disney Resort hotels in the past and had friends or family visit me there, the Cast Members have always been extremely accommodating, so having your family park at
Disney's Coronado Springs Resort should not be a problem at all. Your family will need to inform the Cast Member at the gate that they are visiting you and will likely be asked to show ID at that time.
Also, when you check in, I'd recommend talking with a Cast Member at the front desk to confirm the specific parking rules and to find out what hotel amenities will be available to your family when they visit. I know those rules can vary from one hotel to another, especially when it comes to pool access or parking to visit the theme parks, so they will be able to give you all the details when you check in.
Have a magical time and see ya real soon!
Beth